EP0178599B1 - Control valve, in particular a throttling valve - Google Patents

Control valve, in particular a throttling valve Download PDF

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Publication number
EP0178599B1
EP0178599B1 EP85112889A EP85112889A EP0178599B1 EP 0178599 B1 EP0178599 B1 EP 0178599B1 EP 85112889 A EP85112889 A EP 85112889A EP 85112889 A EP85112889 A EP 85112889A EP 0178599 B1 EP0178599 B1 EP 0178599B1
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EP
European Patent Office
Prior art keywords
valve
locking
stem
locking groove
groove
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP85112889A
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German (de)
French (fr)
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EP0178599A3 (en
EP0178599A2 (en
Inventor
Otmar Dipl.-Ing. Schön
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Flutec Fluidtechnische Geraete GmbH
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Flutec Fluidtechnische Geraete GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Flutec Fluidtechnische Geraete GmbH filed Critical Flutec Fluidtechnische Geraete GmbH
Priority to AT85112889T priority Critical patent/ATE56798T1/en
Publication of EP0178599A2 publication Critical patent/EP0178599A2/en
Publication of EP0178599A3 publication Critical patent/EP0178599A3/en
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Publication of EP0178599B1 publication Critical patent/EP0178599B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0008—Mechanical means
    • F16K37/0016—Mechanical means having a graduated scale
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/52—Means for additional adjustment of the rate of flow
    • F16K1/523—Means for additional adjustment of the rate of flow for limiting the maximum flow rate, using a stop

Definitions

  • the invention is based on the object of developing a control valve such that it can be operated with absolute certainty.
  • This object is achieved according to the invention by the features in the characterizing part of the main claim.
  • a corresponding predetermined breaking point preferably in the area of the securing groove itself, is provided between the valve member and the external thread of the valve stem, it is achieved that in the event of failure, the valve stem in the area the predetermined breaking point breaks as the radially protruding securing element engaging in the securing groove.
  • a plate-shaped valve housing 1 has on its lower flat side in the drawing two adjacent connection points 2 and 3, which are connected to channels 3 and 4, which open into a common cylindrical recess 5 on the upper flat side of the valve housing 1.
  • a valve bushing 6 is inserted, which stands with its fastening flange 7 on the valve housing 1 and is connected to it by means of screws, not shown.
  • An external thread 8 is provided above the mounting flange 7. This is followed by an external cylindrical part, which has an internal thread 9, into which an external thread 10 of a valve stem 11 is screwed.
  • a radially arranged locking pin 17 engages in the securing groove 12 without touching the bottom of the securing groove 12.
  • the locking pin 17 is screwed into the valve bushing 6 with its threaded part 18.
  • the axial length of the securing groove 12 is equal to the sum of the maximum stroke of the valve member 15 and the width of the in particular cylindrical locking pin 17 seen in the axial direction of the valve stem 11.
  • a sealing ring 19 and a sealing washer which seals the gap between the cylindrical part 14 and the valve bushing 6.
  • a driver 20 is fastened in a rotationally fixed manner on the valve stem 11 by means of a knurl, a polygon or the like.
  • the driver 20 is formed on its outside as a polygon, in particular as a hexagon, which is arranged in a sleeve-shaped inner rotary knob part 21 which is adapted to the outer polygon of the driver 20 and is non-rotatable but axially displaceable.
  • the rotary knob part 21 has a bottom 22 which is penetrated by an indicator pin 23 which is coaxially attached to the valve stem 11.
  • the indicator pin 23 bears a marking 24 at its end, which indicates the respective position of the valve member 15 by projecting over a raised edge in the base 22.
  • the valve stem 11 is designed in the area of the securing groove 12 as a predetermined breaking point.
  • the two knob parts 21 and 25 together can also form one piece.
  • the rotary knob 21, 25 and / or the valve stem 11 can only be turned briefly until the locking pin 17 abuts the lower side wall of the locking groove 12.
  • the locking pin 17 thus resists the further rotation of the valve stem 11.
  • the locking pin 17 is designed such that the valve stem 11 breaks in the area of the locking groove 12 (predetermined breaking point) rather than the locking pin 18.
  • the cylindrical part 14 of the valve stem 11 thus remains with certainty in the valve bushing 6. This eliminates the risk that pressure medium which may be under high pressure can escape from the valve bushing 6 as a result of the valve stem 11 being removed.
  • a circlip inserted in an annular groove in the upper region of the internal thread 9 of the valve bushing 6 can also serve as a securing member, which engages in a securing groove in the area of the external thread 10 of the valve stem 11 that is open on the side facing away from the valve member 15.
  • the threaded part 18 of the locking pin 17 can be fixed in its position in the valve bushing 6 by a preferably hardenable locking adhesive.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Preventing Unauthorised Actuation Of Valves (AREA)
  • Indication Of The Valve Opening Or Closing Status (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

1. Control valve, in particular throttle valve, with a valve stem (11) supporting a valve member (15), which stem (11) is arranged to move longitudinally in a valve sleeve (6) by means of a screw-coupling (9, 10), and with a rotary knob (21, 25) connected to the valve stem in a non-rotary manner by an entrainment member (20), which rotary knob is held in its axial position by a retaining member (26, 28) passing radially therethrough and engaging in an annular groove (27) in the valve sleeve and whereof the base (22) serves as a stop for the entrainment member, characterised in that : the valve stem comprises a locking groove (12), in which a locking member (17) located in the valve sleeve engages, the locking groove (12) and the locking member (17) are constructed so that the valve member (15) can occupy any position between its closed position and its widest open position, the valve member is prevented from exceeding its widest open position by the side wall of the locking groove (12) adjacent to the valve member (15), which side wall is provided for abutment with the locking member (17), and provided between the valve member (15) and the external thread (10) of the valve stem (11) is a predetermined breaking point, preferably in the region of the locking groove (12), the locking member (17) engaging on the valve stem (11) between the predetermined breaking point and the valve member (15).

Description

Die Erfindung bezieht sich auf ein Stellventil entsprechend dem Oberbegriff des Anspruchs 1.The invention relates to a control valve according to the preamble of claim 1.

Dahingehende Stellventile wurden vor dem Anmeldetag dieser Erfindung von Anbeitern auf dem Gebiet der Hydrauliktechnik hergestellt und vertrieben. Bei diesen Stellventilen besteht die Gefahr, daß beim Zerstören des Drehknopfes und/oder von dessen axialer Halterung durch Abscheren des Haltegliedes oder des die Ringnut auf seiten des Drehknopfes begrenzenden Flansches die Gewindeverbindung zwischen der Ventilbuchse und dem Ventilschaft gelöst wird, wodurch das Ventilglied aus seiner Lage sich entfernt und Druckmittel ausströmen kann. Steht dieses Druckmittel unter hohem Druck, so kann die Gewindeverbindung auch schon zerstört werden, wenn nur wenige Gewindgänge noch miteinander verbunden sind.Such control valves were manufactured and sold by those in the hydraulic engineering field prior to the filing date of this invention. With these control valves, there is a risk that when the rotary knob and / or its axial support is destroyed by shearing off the holding member or the flange delimiting the annular groove on the rotary knob side, the threaded connection between the valve bushing and the valve stem is released, as a result of which the valve member is out of position moves away and pressure medium can flow out. If this pressure medium is under high pressure, the thread connection can be destroyed even if only a few thread turns are still connected to each other.

Es gehört auch zum Stand der Technik, wie dies die Druckschriften GB-A-412118 und die FR-A-1 333 232 zeigen, bei ein Fluid führenden Teilen die Bewegungsfreiheit eines axial bewegbaren Schaftes durch einen radial verlaufenden Stift zu begrenzen, der in eine innerhalb des Schaftes verlaufende Nut eingreift und mit dieser einen Anschlag bildet. Allein die Übertragung dieses Anschlages auf ein Stellventil der oben genannten Art würde noch immer keine volle Sicherheit mit sich bringen, denn bei einem Versagen dieser weiteren Sicherungsstufe in Form des Anschlages, beispielsweise durch Abscheren des radialen Stiftes, könnte, insbesondere wenn das Druckmittel unter hohem Druck steht, dieses zusammen mit dem Ventilschaft nach wie vor aus der Ventilbuchse austreten.It is also part of the prior art, as is shown in GB-A-412118 and FR-A-1 333 232, to limit the freedom of movement of an axially movable shaft by means of a radially extending pin which engages in a fluid-carrying parts engages within the shaft extending groove and forms a stop with this. Simply transferring this stop to a control valve of the type mentioned above would still not bring full security with it, because if this further safety stage fails in the form of the stop, for example by shearing off the radial pin, especially if the pressure medium is under high pressure is still coming out of the valve bushing together with the valve stem.

Ausgehend von diesem Stand der Technik liegt der Erfindung die Aufgabe zu Grunde, ein Stellventil dahingehend weiterzubilden, daß dieses mit absoluter Sicherheit betreibbar ist. Diese Aufgabe wird durch die Merkmale im kennzeichnenden Teil des Hauptanspruchs erfindungsgemäß gelöst. Dadurch, daß neben dem in die am Ventilschaft angeordnete Sicherungsnut eingreifenden Sicherungsglied noch zwischen dem Ventilglied-und dem Außengewinde des Ventilschaftes eine entsprechende Sollbruchstelle, vorzugsweise im' Bereich der Sicherungsnut selbst Vorgesehen ist, wird erreicht, daß im Falle des Versagens eher der Ventilschaft im Bereich der Sollbruchstelle als das radial hervorstehende, in die Sicherungsnut eingreifende Sicherungsglied bricht. Hierdurch ist mit Sicherheit erreicht, daß der Ventilschaft mit dem Ventilglied, auch bei hohem Druck des Druckmittels, durch das Sicherungsglied gehalten., in der Ventilbuchse verbteibt und Druckmittel nicht austreten kann.Starting from this prior art, the invention is based on the object of developing a control valve such that it can be operated with absolute certainty. This object is achieved according to the invention by the features in the characterizing part of the main claim. The fact that in addition to the securing member engaging in the securing groove arranged on the valve stem, a corresponding predetermined breaking point, preferably in the area of the securing groove itself, is provided between the valve member and the external thread of the valve stem, it is achieved that in the event of failure, the valve stem in the area the predetermined breaking point breaks as the radially protruding securing element engaging in the securing groove. This ensures with certainty that the valve stem with the valve member, held by the securing member even at high pressure of the pressure medium, remains in the valve bushing and pressure medium cannot escape.

Die Merkmale der Ansprüche Z,bis 8 betreffen bevorzugte Weiterbildungen der Erfindung.The features of claims Z to 8 relate to preferred developments of the invention.

Weitere Vorteile ergeben sich aus der Beschreibung und der Zeichnung. In dieser ist ein Drosselventil als Ausführungsbeispiel des Gegenstandes der Erfindung im Längsschnitt schematisch dargestellt.Further advantages result from the description and the drawing. In this, a throttle valve as an embodiment of the object of the invention is shown schematically in longitudinal section.

Ein plattenförmiges Ventilgehäuse 1 hat auf seiner in der Zeichnung unteren flachen Seite zwei nebeneinander liegende Anschlußstellen 2 und 3, die mit Kanälen 3 und 4 verbunden sind, welche in eine gemeinsame zylinderförmige Ausnehmung 5 an der oberen flachen Seite des Ventilgehäuses 1 münden. In diese Ausnehmung ist der untere Teil einer Ventilbuchse 6 eingesetzt, die mit ihrem Befestigungsflansch 7 auf dem Ventilgehäuse 1 aufsteht und mittels nicht dargestellter Schrauben damit verbunden ist. Oberhalb des Befestigungsflansches 7 ist ein Außengewinde 8 vorgesehen. Danach folgt ein außenzylindrischer Teil, der ein Innengewinde 9 hat, in welches ein Außengewinde 10 eines Ventilschaftes 11 eingeschraubt ist.A plate-shaped valve housing 1 has on its lower flat side in the drawing two adjacent connection points 2 and 3, which are connected to channels 3 and 4, which open into a common cylindrical recess 5 on the upper flat side of the valve housing 1. In this recess, the lower part of a valve bushing 6 is inserted, which stands with its fastening flange 7 on the valve housing 1 and is connected to it by means of screws, not shown. An external thread 8 is provided above the mounting flange 7. This is followed by an external cylindrical part, which has an internal thread 9, into which an external thread 10 of a valve stem 11 is screwed.

Der Ventilschaft 11 hat von seinem Außengewinde aus in Richtung zum Ventilgehäuse 1 gesehen eine Sicherungsnut 12 und einen von einer Dichtnut 13 unterbrochenen zylindrischen Teil 14, an dessen freien Ende ein Ventilglied 15 angeordnet ist. Das Ventilglied 15 hat in seiner Mitte einen Spalt 16 und ein kegelförmig sich verjüngendes Ende. Der Übergang zwischen dem zylindrischen Teil 14 und dem Ventilglied 15 ist kegelstumpfförmig ausgebildet und dient als mit dem Ventilgehäuse 1 zusammenwirkender Ventilsitz.The valve stem 11 has, seen from its external thread in the direction of the valve housing 1, a securing groove 12 and a cylindrical part 14 interrupted by a sealing groove 13, at the free end of which a valve member 15 is arranged. The valve member 15 has a gap 16 in its center and a conically tapering end. The transition between the cylindrical part 14 and the valve member 15 is frustoconical and serves as a valve seat interacting with the valve housing 1.

In die Sicherungsnut 12 greift ein radial angeordneter Sicherungsstift 17 ein, ohne den Grund der Sicherungsnut 12 zu berühren. Der Sicherungsstift 17 ist mit seinem Gewindeteil 18 in die Ventilbuchse 6 eingeschraubt. Die axiale Länge der Sicherungsnut 12 gleicht der Summe des maximalen Hubes des Ventilgliedes 15 und der Breite des insbesondere zylindrisch ausgebildeten Sicherungsstiftes 17 in Achsrichtung des Ventilschaftes 11 gesehen. In der Dichtnut 13 sind ein Dichtring 19 und eine Dichtscheibe untergebracht, der den Spalt zwischen dem zylindrischen Teil 14 und der Ventilbuchse 6 abdichtet.A radially arranged locking pin 17 engages in the securing groove 12 without touching the bottom of the securing groove 12. The locking pin 17 is screwed into the valve bushing 6 with its threaded part 18. The axial length of the securing groove 12 is equal to the sum of the maximum stroke of the valve member 15 and the width of the in particular cylindrical locking pin 17 seen in the axial direction of the valve stem 11. In the sealing groove 13, a sealing ring 19 and a sealing washer, which seals the gap between the cylindrical part 14 and the valve bushing 6.

Oberhalb des Außengewindes 10 ist auf dem Ventilschaft 11 ein Mitnehmer 20 mittels eines Rändels, eines Mehrkantes oder dgl. drehfest befestigt. Der Mitnehmer 20 ist auf seiner Außenseite als Mehrkant, insbesondere als Sechskant, ausgebildet, der in einem dem äußeren Mehrkant des Mitnehmers 20 angepaßten, hülsenförmig inneren Drehknopfteil 21 drehfest, aber axial verchiebbar angeordnet ist. Der Drehknopfteil 21 hat einen Boden 22, der von einem am Ventilschaft 11 koaxial angebrachten Anzeigestift 23 durchsetzt ist. Der Anzeigestift 23 trägt an seinem Ende eine Markierung 24, die durch Überstehen über einen Überhöhten Rand im Boden 22 die jeweilige Lage des Ventilgliedes 15 anzeigt. Der innere Drehknopfteil 21 ist in einem hohlzylindrischen äußeren Drehknopteil 25 untergebracht, übergreift des obere Ende der Ventilbuchse 6 und liegt am oberen Teil von deren Zylindermantel an. An diesem Zylindermantel liegt etwas weiter unten auch das untere Ende des Drehknopfteiles 25 an. Eine die beiden Drehknopfteile 21 und 25 durchsetzende und in einen dieser oder in beide Drehknopfteile eingeschraubte Stiftschraube 26 greift mit Spiel in eine Ringnut 27 am oberen Ende der Ventilbuchse 6 ein. In diese Nut greift auch ein auf der gegenüberliegenden Seite angeordneter Haltestift 28 mit Spiel ein, der in einem der beiden Drehknopfteile 21, 25 oder in beiden Teilen dieser Teile befestigt ist. Die Ringnut 27 ist an ihrer Oberseite durch einen Flansch 29 begrenzt.Above the external thread 10, a driver 20 is fastened in a rotationally fixed manner on the valve stem 11 by means of a knurl, a polygon or the like. The driver 20 is formed on its outside as a polygon, in particular as a hexagon, which is arranged in a sleeve-shaped inner rotary knob part 21 which is adapted to the outer polygon of the driver 20 and is non-rotatable but axially displaceable. The rotary knob part 21 has a bottom 22 which is penetrated by an indicator pin 23 which is coaxially attached to the valve stem 11. The indicator pin 23 bears a marking 24 at its end, which indicates the respective position of the valve member 15 by projecting over a raised edge in the base 22. The inner knob part 21 is accommodated in a hollow cylindrical outer knob part 25, engages over the upper end of the valve bushing 6 and lies against the upper part of the cylinder jacket thereof. The lower end of the knob part 25 also lies somewhat further down on this cylinder jacket. A stud screw 26 penetrating the two knob parts 21 and 25 and screwed into one of these or into both knob parts engages with play in an annular groove 27 at the upper end of the Valve socket 6 on. A retaining pin 28 arranged on the opposite side also engages in this groove with play, which is fastened in one of the two knob parts 21, 25 or in both parts of these parts. The annular groove 27 is delimited on its upper side by a flange 29.

Der Ventilschaft 11 ist im Bereich der Sicherungsnut 12 als Sollbruchstelle ausgebildet. Die beiden Drehknopfteile 21 und 25 können zusammen auch ein Stück bilden.The valve stem 11 is designed in the area of the securing groove 12 as a predetermined breaking point. The two knob parts 21 and 25 together can also form one piece.

Beim Drehen des auf seiner Außenseite eine Rändelung oder dgl. aufweisenden Drehknopfes 21, 25 sichern die Stiftschraube 26 und der Haltestift 28 durch Eingreifen in die Ringnut 27 die axiale Lage des Drehknopfes 21, 25 gegenüber der ortsfesten Ventilbuchse 6 und das Ventilglied 15 wird unter der Wirkung der Gewindeverbindung 9, 10 angehoben. Hierbei bewegt sich der Mitnehmer 20 in Richtung zum Boden 22 des inneren Drehknopfteiles 21. Wenn der Mitnehmer 20 den Boden 22 des inneren Drehknopfteiles 21 erreicht hat, ist ein Widerstand gegen weiteres Öffnen des ventilgliedes 15 vorhanden. Wird dieser Widerstand durch Anwendung einer äußeren Kraft überwunden, indem entweder die Stiftschraube 26 und der Haltestift 28 abgeschert oder der die Ringnut 27 auf der Oberseits begrenzende Flansch 29 zerstört wird, können der Drehknopf 21, 25 und/oder der Ventilschaft 11 nur noch kurz gedreht werden, bis der Sicherungsstift 17 an der unteren Seitenwand der Sicherungsnut 12 anliegt. Der Sicherungsstift 17 setzt damit dem Weiterdrehen des Ventilschaftes 11 einen Widerstand entgegen. Der Sicherungsstift 17 ist derart ausgebildet, daß eher der Ventilschaft 11 im Bereich der Sicherungsnut 12 (Sollbruchstelle) als der Sicherungsstift 18 bricht. Der zylindrische Teil 14 des Ventilschaftes 11 verbleibt also mit Sicherheit in der Ventilbuchse 6. Hierdurch ist die Gefahr beseitigt, daß gegebenenfalls unter hohem Druck stehendes Druckmittel infolge Entfernen des Ventilschaftes 11 aus der Ventilbuchse 6 nach außen austreten kann.When turning the knurled knob or the like on its outside. The rotary screw 21 and 25 secure the setscrew 26 and the retaining pin 28 by engaging in the annular groove 27, the axial position of the rotary knob 21, 25 relative to the stationary valve bushing 6 and the valve member 15 is under the Effect of the threaded connection 9, 10 raised. Here, the driver 20 moves in the direction of the bottom 22 of the inner knob part 21. When the driver 20 has reached the bottom 22 of the inner knob part 21, there is resistance to further opening of the valve member 15. If this resistance is overcome by applying an external force, either by shearing off the stud screw 26 and the holding pin 28 or by destroying the flange 29 delimiting the annular groove 27 on the upper side, the rotary knob 21, 25 and / or the valve stem 11 can only be turned briefly until the locking pin 17 abuts the lower side wall of the locking groove 12. The locking pin 17 thus resists the further rotation of the valve stem 11. The locking pin 17 is designed such that the valve stem 11 breaks in the area of the locking groove 12 (predetermined breaking point) rather than the locking pin 18. The cylindrical part 14 of the valve stem 11 thus remains with certainty in the valve bushing 6. This eliminates the risk that pressure medium which may be under high pressure can escape from the valve bushing 6 as a result of the valve stem 11 being removed.

Beim Ausführungsbeispiel liegt der Gewindeteil 18 des Sicherungsstiftes 17 nach außen frei. Dieser Gewindeteil kann außen mittels eines verlängerten Drehknopfes (21, 25) oder eines gegebenenfalls in eine Nut eingesetzten Sicherungsringes abgedeckt sein. Damit der Sicherungsstift nicht in einfacher Weise aus der Ventilbuchse 6 ausgeschraubt werden kann, kann dessen nach außen offene Stirnseite gegebenenfalls zusammen mit der benachbarten Fläche der Ventilbuchse 6 mit einem Lack überzogen sein, der auch in einen Schraubendreherschlitz eindringt und das Ansetzen eines Schraubendrehers verhindert.In the embodiment, the threaded part 18 of the locking pin 17 is exposed to the outside. This threaded part can be covered on the outside by means of an extended rotary knob (21, 25) or a retaining ring which may be inserted into a groove. So that the locking pin cannot be unscrewed from the valve bushing 6 in a simple manner, its front face, which is open to the outside, can, if appropriate, be coated together with the adjacent surface of the valve bushing 6 with a lacquer which also penetrates into a screwdriver slot and prevents the attachment of a screwdriver.

Der Gewindeteil 18 am Sicherungsstift 17 kann entfallen, wenn dieser mit einem Preßsitz in die Ventilbuchse 6 eingesetzt ist, wobei der Sicherungsstift ebenfalls außen abgedeckt sein kann.The threaded part 18 on the locking pin 17 can be omitted if it is inserted with a press fit into the valve bushing 6, wherein the locking pin can also be covered on the outside.

Als Sicherungsglied kann auch eine im oberen Bereich des Innengewindes 9 der Ventilbuchse 6 in eine Ringnut eingesetzter Sprengring dienen, der in eine auf der vom Ventilglied 15 abgewandten Seite offene Sicherungsnut im Bereich des Außengewindes 10 des Ventilschaftes 11 eingreift.A circlip inserted in an annular groove in the upper region of the internal thread 9 of the valve bushing 6 can also serve as a securing member, which engages in a securing groove in the area of the external thread 10 of the valve stem 11 that is open on the side facing away from the valve member 15.

Der Gewindeteil 18 des Sicherungsstiftes 17 kann in seiner Lage in der Ventilbuchse 6 durch einen vorzugsweise aushärtbaren Sicherungskleber festgelegt sein.The threaded part 18 of the locking pin 17 can be fixed in its position in the valve bushing 6 by a preferably hardenable locking adhesive.

Claims (8)

1. Control valve, in particular throttle valve, with a valve stem (11) supporting a valve member (15), which stem (11) is arranged to move longitudinally in a valve sleeve (6) by means of a screw-coupling (9, 10), and with a rotary knob (21, 25) connected to the valve stem in a non-rotary manner by an entrainment member (20), which rotary knob is held in its axial position by a retaining member (26, 28) passing radially therethrough and engaging in an annular groove (27) in the valve sleeve and whereof the base (22) serves as a stop for the entrainment member, characterised in that:
the valve stem comprises a locking groove (12), in which a locking member (17) located in the valve sleeve engages,
the locking groove (12) and the locking member (17) are constructed so that the valve member (15) can occupy any position between its closed position and its widest open position,
the valve member is prevented from exceeding its widest open position by the side wall of the locking groove (12) adjacent to the valve member (15), which side wall is provided for abutment with the locking member (17), and
provided between the valve member (15) and the external thread (10) of the valve stem (11) is a predetermined breaking point, preferably in the region of the locking groove (12), the locking member (17) engaging on the valve stem (11) between the predetermined breaking point and the valve member (15).
2. Control valve according to Claim 1, characterised in that the base of the locking groove (12) is constructed to be cylindrical and has a diameter corresponding to the predetermined breaking point.
3. Control valve according to Claim 1, characterised in that the width of the locking groove (12) is equal to the sum of the maximum stroke of the valve member (15) and the dimensions of the part of the locking member (17) engaging in the locking groove (12), seen in the axial direction of the valve stem (11).
4. Control valve according to one of the preceding Claims, characterised in that the locking member (12) is covered externally.
5. Control valve according to Claim 4, characterised in that the locking member (12) is covered by the rotary knob (21, 25).
6. Control valve according to Claim 4, characterised in that the locking member (12) is covered by a spring ring.
7. Control valve according to one of Claims 4 to 6, characterised in that the locking member (12) is covered externally by a layer of varnish.
8. Control valve according to one of Claims 1 to 4, characterised in that the locking member is a spring ring, which is located in an annular groove on the inside of the valve sleeve (6) and that provided in the region of the external thread (10) of the valve stem (11) is a locking groove open on the side remote from the valve member (15).
EP85112889A 1984-10-13 1985-10-11 Control valve, in particular a throttling valve Expired - Lifetime EP0178599B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85112889T ATE56798T1 (en) 1984-10-13 1985-10-11 CONTROL VALVE, ESPECIALLY THROTTLE VALVE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3437593A DE3437593C2 (en) 1984-10-13 1984-10-13 Control valve, especially a throttle valve
DE3437593 1984-10-13

Publications (3)

Publication Number Publication Date
EP0178599A2 EP0178599A2 (en) 1986-04-23
EP0178599A3 EP0178599A3 (en) 1988-10-12
EP0178599B1 true EP0178599B1 (en) 1990-09-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP85112889A Expired - Lifetime EP0178599B1 (en) 1984-10-13 1985-10-11 Control valve, in particular a throttling valve

Country Status (4)

Country Link
EP (1) EP0178599B1 (en)
JP (1) JPS61157886A (en)
AT (1) ATE56798T1 (en)
DE (1) DE3437593C2 (en)

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DE29506770U1 (en) * 1995-04-21 1995-06-22 Richter Albert Ari Armaturen Valve with spindle stroke limitation
DE19701200C2 (en) * 1997-01-15 2000-10-26 Knorr Bremse Systeme Pressure control valve
DE19802817A1 (en) * 1998-01-26 1999-08-12 Klein Schanzlin & Becker Ag Cap with an integrated position indicator and stroke limitation for the stem of a shut-off valve as well as a method and device for its manufacture
CN104864166A (en) * 2015-04-15 2015-08-26 王福成 Burglar-proof anti-freezing and antirust screw rod protector device for pipeline flow distribution

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GB412118A (en) * 1933-12-05 1934-06-21 Harry Schmidt Improvements in water taps for wash-hand basins and the like
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JPS6120386Y2 (en) * 1979-08-31 1986-06-19
JPH0318789U (en) * 1989-06-30 1991-02-25

Also Published As

Publication number Publication date
JPH0562276B2 (en) 1993-09-08
EP0178599A3 (en) 1988-10-12
ATE56798T1 (en) 1990-10-15
DE3437593C2 (en) 1986-08-21
JPS61157886A (en) 1986-07-17
EP0178599A2 (en) 1986-04-23
DE3437593A1 (en) 1986-04-17

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